Triumph BSA Conical Rear Hub Stainless Spoke Set 18" 1971-75 Twins Oil Tank Filter why didn't the factory come

why didn't the factory come out with this

M Part number is 54950625

Harris and are exceptionally high quality

Quality Replacement Part

Accepts a 7/16" BSP nut for the fuel line

Triumph BSA Conical Rear Hub Stainless Spoke Set 18" 1971-75 Twins Oil Tank Filter why didn't the factory comeNew Buchanan's 18" Conical Rear Hub Stainless Spoke & Nipple Set. Buchanan's stainless spokes and nipples are arguably the best quality wheel components for your vintage Triumph and BSA motorcycle. Included are 40 stainless spokes, 40 stainless nipples, and assembly lube. This set is correct for an 18" rear rim 37 3784 or W3784 and a conical rear hub as fitted to Triumph & BSA twins & triples Bonneville, T120R, T140, A65, T150, etc from 1971 1975.